AI & Prompt Tools · Free tool
Agent JSON Validator
Paste tool-call or agent-output JSON — parse, pretty-print, highlight errors, and count keys and depth.
Updated April 2026
Overall
All checks passed
- +Schema parses as JSON
- +Output parses as JSON
- +required field "city" present
- +required field "units" present
- +"city" type = string
- +"units" type = string
- +"days" type = number
Supports required-field checks and shallow type checks (string, number, boolean, array, object, null). Not a full JSON-Schema validator.
Found this useful?Email
Advertisement
What it does
Validate JSON emitted by agents and tool calls — with line numbers and key counts.
Runs entirely in your browser — no upload, no account, no watermark. For more tools in this category see the full tools index.
How to use it
- Paste the JSON.
- Read parse status and errors.
- Copy the pretty-printed output.
Advertisement